Norma EN ISO 12543-6:1998

Poniższe dotyczy: szkło warstwowe

1. Scope of the standard

This standard specifies defects in finished products and test methods for the appearance of glass when viewed through it. Particular attention was paid to the acceptable criteria for assessing the visual field. The criteria refer to the assessment of products upon receipt.

2. Referenced standards

This European Standard incorporates, by dated or undated reference, requirements from other publications. These references are quoted in the appropriate places in the text of the standard, and the list of publications is given below. For dated references, subsequent amendments or revisions to any of these publications apply to this European Standard only when incorporated into it by amendment or revision. For undated references, the latest edition of the publication referred to applies.

EN ISO 21543-1 Glass in building – Laminated glass and laminated safety glass – Part 1: Definitions and description of component parts

EN ISO 12543-5 Glass in building – Laminated glass and laminated safety glass – Part 5: Dimensions and edge finishing

3. Definitions

The following definitions are used in this standard together with the definitions given in EN ISO 12543-1:

3.1 point defects: These types of defects include opaque spots, bubbles and foreign bodies.

3.2 linear defects: These types of defects include foreign bodies and minor or deep scratches.

3.3 other defects: Glass defects such as scratches and interlayer defects such as wrinkles, shrinkage and streaks.

3.4 non-transparent disadvantages: Visible defects in laminated glass (for example – traces of tin inclusions in the glass or interlayer).

3.5 pęcherzyki: These are usually air bubbles that may be present in the glass or interlayer.

3.6 ciała obce: Any undesirable inclusion introduced during the production of laminated glass.

3.7 minor or deep scratches: Linear damage to the outer surface of laminated glass.

3.8 cracks: Sharp-pointed fissures or cracks extending through the glass from the periphery.

3.9 wrinkles: Distortion present in the interlayer after manufacturing as visible folds.

3.10 streaks originating from interlayer heterogeneity: Distortion in the interlayer, caused by defects in the manufacturing process of the interlayer that become apparent after manufacture.

4. Defects in the field of view

4.1 Point defects in the field of view

During the inspection according to the method given in chapter 9, the occurrence of spot defects is allowed depending on:

– defect size;

– repeatability of the defect;

– the size of the glass;

– the number of panes included in the laminated glass.

This is presented in table 1.

Defects less than 0.5 mm are not taken into account.

Defects greater than 3 mm are unacceptable.

NOTE: The admissibility of spot defects in laminated glass does not depend on the thickness of the glass.


Table 1 – allowable spot defects in the field of view

NOTE: A cluster of defects occurs when four or more defects are <200mm apart. This distance is reduced to 180 mm for laminated glass consisting of four panes and to 100 mm for laminated glass consisting of five or more panes.

The number of acceptable defects given in Table 1 may be increased by 1 for each single interlayer which is thicker than 2mm.

4.2 Linear defects in the field of view

When inspected according to the method given in Chapter 9, linear defects are allowed as shown in Table 2.


Table 2 – Number of allowable defects in the field of view.

Linear defects less than 30 mm in length are acceptable.

5. Defects in the marginal strip intended for framing

When inspected according to the method given in section 9, defects which do not exceed 5 mm in diameter are allowed in the marginal strip. In shafts with a size of ≤ 5 m2, the width of the edge strip is 15 mm. The width of the edge strip is increased to 20 mm in shaft sizes > 5 m2. If there are bubbles, the area of ​​bubbles should not exceed 5% of the edge area.

6. Cracks

Cracks are not allowed.

7. Wrinkles and streaks

Wrinkles and streaks are not allowed in the field of vision.

8. Defects in the edge strip not intended for framing

Laminated glass is usually installed within; if it is not framed, the edging may be:

– sanded;

– polished;

– obliquely cut,

according to EN ISO 12543-5.

In such cases, chips, bubbles, interlayer defects and recesses are acceptable if they are not noticeable during testing (see Chapter 9).

9. Test method

Laminated glass should be viewed vertically and parallel to a frosted gray screen under bright diffused daylight or equivalent.

The observer should be at a distance of 2 m from the glass, observing it perpendicularly (the frosted screen will be on the other side of the glass).

Observed defects should be marked.

The following applies to: glass

Differences in the gaps between the panes may differ up to 5 cm in relation to the design and visualization

The following applies to: metal elements

1. Curvature differences up to 5mm result from the expansion and contraction of the metal under the influence of temperatures and are not a product defect.

2. Paint defects that are not visible from a distance of 2 meters and above 2 meters are not a defect of the product

3. An uneven welding seam (in other words – WELDINGS) is not a defect of the product


The reason for this behavior of stainless steel may be contamination of steel with iron or carbon steel particles. The cause may be uusing the same tools for stainless steel that we used, for example, for cutting or grinding other steels, or working on this steel in the immediate vicinity of carbon steels (unalloyed). It is also unfavorable transport or store black steel and stainless steel together. An additional element that may affect the corrosion resistance of stainless steel is contact with unsuitable aggressive chemicals (chloride solutions).

Raises on stainless steel elements after the winter, stains and discoloration in production halls, matting and initial pitting.

Calm down – it’s normal!

Stainless steel, among other materials, is famous for the fact that it does not require additional protection to protect its appearance and properties – however, like any other construction material – glass, ceramics or porcelain –

requires care and cleaning , to keep its shine and aesthetic appearance for longer, and thus unique properties.

With the frequency depending on the conditions in which a given stainless steel material is used – proper maintenance and cleaning is necessary.

Stainless steel is resistant to corrosion due to the fact that alloying elements form a thin transparent protective layer on its surface. It is very thin, but it is an ideal protection of the steel surface against corrosion. In outdoor applications, where rain and snow can be expected to wash off deposited contaminants, these discolorations may occur. In this case, it must be ensured that all dirt is removed by appropriate maintenance. The frequency of cleaning and maintenance depends on the degree of use and the conditions in which the assortment is kept.

The first discolorations and dust appearing during the use of the material can be easily removed with an ordinary cloth, chamois leather or, for larger dirt, with a nylon sponge – i.e. materials usually used every day in every household.

Do not use steel pads for scrubbing or wire brushes – they may leave carbon steel deposits on the surface, which in turn will lead to rusting of the material. Local discolorations caused by fingerprints, dust or rain can be removed very easily and quickly. If iron particles appear on the stainless steel elements, for example during assembly, they should be removed immediately. These particles will eventually start to rust on their own and may break the self-adhesive film that protects the stainless steel – eventually causing rusting. Such deposits should be removed mechanically or with stainless steel cleaners.

If pits appear on the component, acid etching or mechanical methods are necessary here.

A very important issue is to be especially careful during assembly – it is best to mount stainless steel elements at the very end. It should be remembered that the etching process can irreversibly change the appearance of the object, which in most cases is not desirable.

Local discoloration, fingerprints of grease – if they are small, ordinary soapy water is enough to remove them. For heavier soiling, use a suitable cleaning and maintenance agent.

Alcohol-based preparations can be used for cleaning – they do not pose a threat to the anti-corrosion properties of stainless steel.

After cleaning, it is always advisable to polish with a dry cloth.

For cleaning, do not use: agents containing chlorides and under no circumstances silver cleaners.

The frequency of cleaning stainless steel elements is a very individual matter – it all depends on the degree of use and the degree of dirt. This should be done at such times as to minimize the risk of rusting of the stainless steel components.

It is recommended to clean every 12 months for light soiling and every 6 months for heavy soiling.

The following applies to: natural elements

1. The RAPDACH company is not responsible for the natural elements sold, such as wood. Deformations caused by temperature differences and weather conditions are a natural phenomenon not dependent on the Seller.

We recommend preserving the wood as the seasons change.

Rapdach Sp. Z O.O
Ptaszkowa 957
33-333 Ptaszkowa
Tel: +48 888 444 517